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rswitch: Add PM ops

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Add PM ops for Suspend to Idle. When the system suspended,
the Ethernet Serdes's clock will be stopped. So, this driver needs
to re-initialize the Ethernet Serdes by phy_init() in
renesas_eth_sw_resume(). Otherwise, timeout happened in phy_power_on().

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Yoshihiro Shimoda 2023-10-17 20:34:02 +09:00 committed by Paolo Abeni
parent 1bf5563069
commit 35b78409e1
1 changed files with 43 additions and 0 deletions
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43
drivers/net/ethernet/renesas/rswitch.c
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@ -17,6 +17,7 @@
#include <linux/of_net.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>
@ -1315,6 +1316,7 @@ static int rswitch_phy_device_init(struct rswitch_device *rdev)
if (!phydev)
goto out;
__set_bit(rdev->etha->phy_interface, phydev->host_interfaces);
phydev->mac_managed_pm = true;
phydev = of_phy_connect(rdev->ndev, phy, rswitch_adjust_link, 0,
rdev->etha->phy_interface);
@ -1995,11 +1997,52 @@ static void renesas_eth_sw_remove(struct platform_device *pdev)
platform_set_drvdata(pdev, NULL);
}
static int renesas_eth_sw_suspend(struct device *dev)
{
struct rswitch_private *priv = dev_get_drvdata(dev);
struct net_device *ndev;
unsigned int i;
rswitch_for_each_enabled_port(priv, i) {
ndev = priv->rdev[i]->ndev;
if (netif_running(ndev)) {
netif_device_detach(ndev);
rswitch_stop(ndev);
}
if (priv->rdev[i]->serdes->init_count)
phy_exit(priv->rdev[i]->serdes);
}
return 0;
}
static int renesas_eth_sw_resume(struct device *dev)
{
struct rswitch_private *priv = dev_get_drvdata(dev);
struct net_device *ndev;
unsigned int i;
rswitch_for_each_enabled_port(priv, i) {
phy_init(priv->rdev[i]->serdes);
ndev = priv->rdev[i]->ndev;
if (netif_running(ndev)) {
rswitch_open(ndev);
netif_device_attach(ndev);
}
}
return 0;
}
static DEFINE_SIMPLE_DEV_PM_OPS(renesas_eth_sw_pm_ops, renesas_eth_sw_suspend,
renesas_eth_sw_resume);
static struct platform_driver renesas_eth_sw_driver_platform = {
.probe = renesas_eth_sw_probe,
.remove_new = renesas_eth_sw_remove,
.driver = {
.name = "renesas_eth_sw",
.pm = pm_sleep_ptr(&renesas_eth_sw_pm_ops),
.of_match_table = renesas_eth_sw_of_table,
}
};